So you mean just that they are advertising their tap water? Or are they distributing as bottled water or something?! I don’t see any benefit if they bottle it, but making people more aware of the quality of the drinking water is a great step. In a previous thread I suggested that North American cities adopt the old world European practice of having water public water fountains around town where everyone can refill their own bottles… I think it would go a long way to making bottled water – and the associated unnecessary waste bottles – obsolete.
For some perspective on this issue, go here and scroll down to the “Plastic Bottles, 2007” piece. It depicts the number of plastic bottles used in the US every five minutes.